End-to-end Ruby on Rails expertise

Rails & architecture

Designing maintainable Rails applications: organizing business logic layers, managing coupling, choosing between a modular monolith and service extraction only when the context justifies it, never on principle.

Code quality & tests

Building and maintaining a reliable test suite (RSpec/Minitest), code review, conventions shared across the team, reducing duplication and dead code.

PostgreSQL

Schema design, indexing, complex queries, zero-downtime migrations, managing data growth.

Redis & Sidekiq

Application caching, background job queues, worker sizing, retry and long-job handling.

Performance & observability

Diagnosing slowdowns, setting up metrics and traces to measure the real impact of changes over time.

Infrastructure

Deployment, environment configuration, guidance on hosting choices sized to the product's actual needs.